If you need technical help with using BL then Support is the best forum.
If you need emotional support and help then head over to The Dark Side.
A great general place to start when you are new to BL is Basic Drug Discussion - it's the current featured forum here, check out the sticky at the top of this forum for more info. We're a friendly bunch and are happy to answer any basic drugs/HR questions you might have. We've also got a lovely social where you can get to know your fellow BLers, and a "Fact of the Month" competition - this month we are looking for interesting/cool/useful facts about stimulants and uppers. Check out the sticky in BDD for the entries so far, and post your fact in our social thread for a chance to win a custom title and widespread admiration and respect
I'm one of the BDD mods and am coming in here spreading the word about how awesome we are! :D
There are loads of other forums as I am sure you have noticed - have an explore!